JPS635059U - - Google Patents
Info
- Publication number
- JPS635059U JPS635059U JP9890286U JP9890286U JPS635059U JP S635059 U JPS635059 U JP S635059U JP 9890286 U JP9890286 U JP 9890286U JP 9890286 U JP9890286 U JP 9890286U JP S635059 U JPS635059 U JP S635059U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- hydraulic circuit
- hydraulic
- operating
- drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図Ａは本考案の一実施例を示す油圧シヨベ
ルの側面図、第１図Ｂは第１図Ａの駆動油圧回路
図、第２図は油圧シヨベルの側面図、第３図は第
２図に示した油圧シヨベルの従来の駆動油圧回路
図、第４図は従来の電子制御回路を示す機構図、
第５図はレベルシリンダ使用の従来例を示す側面
図である。
２，３，４：操作弁、６：外部負荷を受ける油
圧シリンダ、７：主操作用の油圧シリンダ、１６
ａ，ｂ：油圧回路、２１：連動油圧回路、２２：
連動パイロツト圧路、２３：切換開閉弁、２５：
逆止弁、２７，２８：開閉操作機構。
FIG. 1A is a side view of a hydraulic excavator showing an embodiment of the present invention, FIG. 1B is a drive hydraulic circuit diagram of FIG. 1A, FIG. 2 is a side view of the hydraulic excavator, and FIG. Figure 4 is a conventional drive hydraulic circuit diagram of a hydraulic excavator, and Figure 4 is a mechanism diagram showing a conventional electronic control circuit.
FIG. 5 is a side view showing a conventional example using a level cylinder. 2, 3, 4: Operation valve, 6: Hydraulic cylinder that receives external load, 7: Hydraulic cylinder for main operation, 16
a, b: Hydraulic circuit, 21: Interlocking hydraulic circuit, 22:
Interlocking pilot pressure path, 23: Switching on/off valve, 25:
Check valve, 27, 28: opening/closing operation mechanism.
Claims (1)
て制御し、前記各油圧シリンダの各油圧回路に操
作弁を設けた駆動油圧回路において、外部負荷を
受ける前記油圧シリンダの油圧回路に絞り弁と開
閉切換弁および逆止弁を有し両油室間をバイパス
する連動油圧回路を付設するとともに、主操作用
となる前記油圧シリンダの操作弁作動用パイロツ
ト圧路に前記開閉切換弁の開閉操作機構付き連動
パイロツト圧路を連設したことを特徴とする建設
機械の駆動油圧回路。 In a drive hydraulic circuit in which the drive system of construction machinery is controlled by a plurality of hydraulic cylinders, and each hydraulic circuit of each of the hydraulic cylinders is provided with an operating valve, a throttle valve and an opening/closing valve are provided in the hydraulic circuit of the hydraulic cylinder that receives an external load. An interlocking hydraulic circuit having a switching valve and a check valve and bypassing between both oil chambers is attached, and a pilot pressure path for operating the operating valve of the hydraulic cylinder used for main operation is equipped with an opening/closing operation mechanism for the switching valve. A drive hydraulic circuit for construction machinery, characterized in that an interlocking pilot pressure path is provided in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9890286U JPS635059U (en) | 1986-06-30 | 1986-06-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9890286U JPS635059U (en) | 1986-06-30 | 1986-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS635059U true JPS635059U (en) | 1988-01-13 |
Family
ID=30967290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9890286U Pending JPS635059U (en) | 1986-06-30 | 1986-06-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS635059U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5673731A (en) * | 1980-04-07 | 1981-06-18 | Sumitomo Heavy Ind Ltd | Loading shovel |
-
1986
- 1986-06-30 JP JP9890286U patent/JPS635059U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5673731A (en) * | 1980-04-07 | 1981-06-18 | Sumitomo Heavy Ind Ltd | Loading shovel |
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